public/javascripts/components/game.js

   1 // TODO: envoyer juste "light move", sans FEN ni notation ...etc
   2 // TODO: also "observers" prop, we should send moves to them too (in a web worker ? webRTC ?)
   3
   4 // Game logic on a variant page: 3 modes, analyze, computer or human
   5 Vue.component('my-game', {
   6     // gameId: to find the game in storage (assumption: it exists)
   7     props: ["gameId","fen","mode","allowChat","allowMovelist"],
   8     data: function() {
   9         return {
  10             // if oppid == "computer" then mode = "computer" (otherwise human)
  11             myid: "", //our ID, always set
  12             //this.myid = localStorage.getItem("myid")
  13             oppid: "", //opponent ID in case of HH game
  14             score: "*", //'*' means 'unfinished'
  15             mycolor: "w",
  16             conn: null, //socket connection (et WebRTC connection ?!)
  17             oppConnected: false, //TODO?
  18             pgnTxt: "",
  19             // sound level: 0 = no sound, 1 = sound only on newgame, 2 = always
  20             sound: parseInt(localStorage["sound"] || "2"),
  21             // Web worker to play computer moves without freezing interface:
  22             compWorker: new Worker('/javascripts/playCompMove.js'),
  23             timeStart: undefined, //time when computer starts thinking
  24             vr: null, //VariantRules object, describing the game state + rules
  25         };
  26     },
  27     watch: {
  28         fen: function(newFen) {
  29             this.vr = new VariantRules(newFen);
  30         },
  31     },
  32     computed: {
  33         showChat: function() {
  34             return this.allowChat && this.mode=='human' && this.score != '*';
  35         },
  36         showMoves: function() {
  37             return this.allowMovelist && window.innerWidth >= 768;
  38         },
  39         showFen: function() {
  40             return variant.name != "Dark" || this.score != "*";
  41         },
  42     },
  43     // Modal end of game, and then sub-components
  44     // TODO: provide chat parameters (connection, players ID...)
  45     // and alwo moveList parameters (just moves ?)
  46     // TODO: connection + turn indicators en haut à droite (superposé au menu)
  47     // TODO: controls: abort, clear, resign, draw (avec confirm box)
  48     // et si partie terminée : (mode analyse) just clear, back / play
  49     // + flip button toujours disponible
  50     // gotoMove : vr = new VariantRules(fen stocké dans le coup [TODO])
  51     template: `
  52         <div class="col-sm-12 col-md-10 col-md-offset-1 col-lg-8 col-lg-offset-2">
  53             <input id="modal-eog" type="checkbox" class="modal"/>
  54             <div role="dialog" aria-labelledby="eogMessage">
  55                 <div class="card smallpad small-modal text-center">
  56                     <label for="modal-eog" class="modal-close">
  57                     </label>
  58                     <h3 id="eogMessage" class="section">
  59                         {{ endgameMessage }}
  60                     </h3>
  61                 </div>
  62             </div>
  63             <my-chat v-if="showChat">
  64             </my-chat>
  65             <my-board v-bind:vr="vr">
  66             </my-board>
  67             <div v-show="showFen" id="fen-div" class="section-content">
  68                 <p id="fen-string" class="text-center">
  69                     {{ vr.getFen() }}
  70                 </p>
  71             </div>
  72             <div id="pgn-div" class="section-content">
  73                 <a id="download" href: "#">
  74                 </a>
  75                 <button id="downloadBtn" @click="download">
  76                     {{ translations["Download PGN"] }}
  77                 </button>
  78             </div>
  79             <my-move-list v-if="showMoves">
  80             </my-move-list>
  81         </div>
  82     `,
  83     created: function() {
  84         const url = socketUrl;
  85         this.conn = new WebSocket(url + "/?sid=" + this.myid + "&page=" + variant._id);
  86         // TODO: after game, archive in indexedDB
  87         // TODO: this events listener is central. Refactor ? How ?
  88         const socketMessageListener = msg => {
  89             const data = JSON.parse(msg.data);
  90             let L = undefined;
  91             switch (data.code)
  92             {
  93                 case "newmove": //..he played!
  94                     this.play(data.move, (variant.name!="Dark" ? "animate" : null));
  95                     break;
  96                 case "pong": //received if we sent a ping (game still alive on our side)
  97                     if (this.gameId != data.gameId)
  98                         break; //games IDs don't match: definitely over...
  99                     this.oppConnected = true;
 100                     // Send our "last state" informations to opponent
 101                     L = this.vr.moves.length;
 102                     this.conn.send(JSON.stringify({
 103                         code: "lastate",
 104                         oppid: this.oppid,
 105                         gameId: this.gameId,
 106                         lastMove: (L>0?this.vr.moves[L-1]:undefined),
 107                         movesCount: L,
 108                     }));
 109                     break;
 110                 case "lastate": //got opponent infos about last move
 111                     L = this.vr.moves.length;
 112                     if (this.gameId != data.gameId)
 113                         break; //games IDs don't match: nothing we can do...
 114                     // OK, opponent still in game (which might be over)
 115                     if (this.score != "*")
 116                     {
 117                         // We finished the game (any result possible)
 118                         this.conn.send(JSON.stringify({
 119                             code: "lastate",
 120                             oppid: data.oppid,
 121                             gameId: this.gameId,
 122                             score: this.score,
 123                         }));
 124                     }
 125                     else if (!!data.score) //opponent finished the game
 126                         this.endGame(data.score);
 127                     else if (data.movesCount < L)
 128                     {
 129                         // We must tell last move to opponent
 130                         this.conn.send(JSON.stringify({
 131                             code: "lastate",
 132                             oppid: this.oppid,
 133                             gameId: this.gameId,
 134                             lastMove: this.vr.moves[L-1],
 135                             movesCount: L,
 136                         }));
 137                     }
 138                     else if (data.movesCount > L) //just got last move from him
 139                         this.play(data.lastMove, "animate");
 140                     break;
 141                 case "resign": //..you won!
 142                     this.endGame(this.mycolor=="w"?"1-0":"0-1");
 143                     break;
 144                 // TODO: also use (dis)connect info to count online players?
 145                 case "connect":
 146                 case "disconnect":
 147                     if (this.mode=="human" && this.oppid == data.id)
 148                         this.oppConnected = (data.code == "connect");
 149                     if (this.oppConnected && this.score != "*")
 150                     {
 151                         // Send our name to the opponent, in case of he hasn't it
 152                         this.conn.send(JSON.stringify({
 153                             code:"myname", name:this.myname, oppid: this.oppid}));
 154                     }
 155                     break;
 156             }
 157         };
 158
 159         const socketCloseListener = () => {
 160             this.conn = new WebSocket(url + "/?sid=" + this.myid + "&page=" + variant._id);
 161             this.conn.addEventListener('message', socketMessageListener);
 162             this.conn.addEventListener('close', socketCloseListener);
 163         };
 164         this.conn.onmessage = socketMessageListener;
 165         this.conn.onclose = socketCloseListener;
 166
 167         // Computer moves web worker logic: (TODO: also for observers in HH games)
 168         this.compWorker.postMessage(["scripts",variant.name]);
 169         const self = this;
 170         this.compWorker.onmessage = function(e) {
 171             let compMove = e.data;
 172             if (!compMove)
 173                 return; //may happen if MarseilleRules and subTurn==2 (TODO: a bit ugly...)
 174             if (!Array.isArray(compMove))
 175                 compMove = [compMove]; //to deal with MarseilleRules
 176             // TODO: imperfect attempt to avoid ghost move:
 177             compMove.forEach(m => { m.computer = true; });
 178             // (first move) HACK: small delay to avoid selecting elements
 179             // before they appear on page:
 180             const delay = Math.max(500-(Date.now()-self.timeStart), 0);
 181             setTimeout(() => {
 182                 const animate = (variant.name!="Dark" ? "animate" : null);
 183                 if (self.mode == "computer") //warning: mode could have changed!
 184                     self.play(compMove[0], animate);
 185                 if (compMove.length == 2)
 186                     setTimeout( () => {
 187                         if (self.mode == "computer")
 188                             self.play(compMove[1], animate);
 189                     }, 750);
 190             }, delay);
 191         }
 192     },
 193     //TODO: conn pourrait être une prop, donnée depuis variant.js
 194     //dans variant.js (plutôt room.js) conn gère aussi les challenges
 195     // Puis en webRTC, repenser tout ça.
 196     methods: {
 197         setEndgameMessage: function(score) {
 198             let eogMessage = "Undefined";
 199             switch (score)
 200             {
 201                 case "1-0":
 202                     eogMessage = translations["White win"];
 203                     break;
 204                 case "0-1":
 205                     eogMessage = translations["Black win"];
 206                     break;
 207                 case "1/2":
 208                     eogMessage = translations["Draw"];
 209                     break;
 210                 case "?":
 211                     eogMessage = "Unfinished";
 212                     break;
 213             }
 214             this.endgameMessage = eogMessage;
 215         },
 216         download: function() {
 217             // Variants may have special PGN structure (so next function isn't defined here)
 218             // TODO: get fenStart from local game (using gameid)
 219             const content = V.GetPGN(this.moves, this.mycolor, this.score, fenStart, this.mode);
 220             // Prepare and trigger download link
 221             let downloadAnchor = document.getElementById("download");
 222             downloadAnchor.setAttribute("download", "game.pgn");
 223             downloadAnchor.href = "data:text/plain;charset=utf-8," + encodeURIComponent(content);
 224             downloadAnchor.click();
 225         },
 226         showScoreMsg: function(score) {
 227             this.setEndgameMessage(score);
 228             let modalBox = document.getElementById("modal-eog");
 229             modalBox.checked = true;
 230             setTimeout(() => { modalBox.checked = false; }, 2000);
 231         },
 232         endGame: function(score) {
 233             this.score = score;
 234             if (["human","computer"].includes(this.mode))
 235             {
 236                 const prefix = (this.mode=="computer" ? "comp-" : "");
 237                 localStorage.setItem(prefix+"score", score);
 238             }
 239             this.showScoreMsg(score);
 240             if (this.mode == "human" && this.oppConnected)
 241             {
 242                 // Send our nickname to opponent
 243                 this.conn.send(JSON.stringify({
 244                     code:"myname", name:this.myname, oppid:this.oppid}));
 245             }
 246             // TODO: what about cursor ?
 247             //this.cursor = this.vr.moves.length; //to navigate in finished game
 248         },
 249         resign: function(e) {
 250             this.getRidOfTooltip(e.currentTarget);
 251             if (this.mode == "human" && this.oppConnected)
 252             {
 253                 try {
 254                     this.conn.send(JSON.stringify({code: "resign", oppid: this.oppid}));
 255                 } catch (INVALID_STATE_ERR) {
 256                     return; //socket is not ready (and not yet reconnected)
 257                 }
 258             }
 259             this.endGame(this.mycolor=="w"?"0-1":"1-0");
 260         },
 261         playComputerMove: function() {
 262             this.timeStart = Date.now();
 263             this.compWorker.postMessage(["askmove"]);
 264         },
 265         animateMove: function(move) {
 266             let startSquare = document.getElementById(this.getSquareId(move.start));
 267             let endSquare = document.getElementById(this.getSquareId(move.end));
 268             let rectStart = startSquare.getBoundingClientRect();
 269             let rectEnd = endSquare.getBoundingClientRect();
 270             let translation = {x:rectEnd.x-rectStart.x, y:rectEnd.y-rectStart.y};
 271             let movingPiece =
 272                 document.querySelector("#" + this.getSquareId(move.start) + " > img.piece");
 273             // HACK for animation (with positive translate, image slides "under background")
 274             // Possible improvement: just alter squares on the piece's way...
 275             squares = document.getElementsByClassName("board");
 276             for (let i=0; i<squares.length; i++)
 277             {
 278                 let square = squares.item(i);
 279                 if (square.id != this.getSquareId(move.start))
 280                     square.style.zIndex = "-1";
 281             }
 282             movingPiece.style.transform = "translate(" + translation.x + "px," +
 283                 translation.y + "px)";
 284             movingPiece.style.transitionDuration = "0.2s";
 285             movingPiece.style.zIndex = "3000";
 286             setTimeout( () => {
 287                 for (let i=0; i<squares.length; i++)
 288                     squares.item(i).style.zIndex = "auto";
 289                 movingPiece.style = {}; //required e.g. for 0-0 with KR swap
 290                 this.play(move); //TODO: plutôt envoyer message "please play"
 291             }, 250);
 292         },
 293         play: function(move, programmatic) {
 294             if (!!programmatic) //computer or human opponent
 295                 return this.animateMove(move);
 296             // Not programmatic, or animation is over
 297             if (!move.notation)
 298                 move.notation = this.vr.getNotation(move);
 299             this.vr.play(move);
 300             if (!move.fen)
 301                 move.fen = this.vr.getFen();
 302             if (this.sound == 2)
 303                 new Audio("/sounds/move.mp3").play().catch(err => {});
 304             if (this.mode == "human")
 305             {
 306                 updateStorage(move); //after our moves and opponent moves
 307                 if (this.vr.turn == this.userColor)
 308                     this.conn.send(JSON.stringify({code:"newmove", move:move, oppid:this.oppid}));
 309             }
 310             else if (this.mode == "computer")
 311             {
 312                 // Send the move to web worker (including his own moves)
 313                 this.compWorker.postMessage(["newmove",move]);
 314             }
 315             if (this.score == "*" || this.mode == "analyze")
 316             {
 317                 // Stack move on movesList
 318                 this.moves.push(move);
 319             }
 320             // Is opponent in check?
 321             this.incheck = this.vr.getCheckSquares(this.vr.turn);
 322             const score = this.vr.getCurrentScore();
 323             if (score != "*")
 324             {
 325                 if (["human","computer"].includes(this.mode))
 326                     this.endGame(score);
 327                 else //just show score on screen (allow undo)
 328                     this.showScoreMsg(score);
 329                 // TODO: notify end of game (give score)
 330             }
 331             else if (this.mode == "computer" && this.vr.turn != this.userColor)
 332                 this.playComputerMove();
 333         },
 334         undo: function(move) {
 335             this.vr.undo(move);
 336             if (this.sound == 2)
 337                 new Audio("/sounds/undo.mp3").play().catch(err => {});
 338             this.incheck = this.vr.getCheckSquares(this.vr.turn);
 339             if (this.mode == "analyze")
 340                 this.moves.pop();
 341         },
 342     },
 343 })
 344 // cursor + ........
 345 //TODO: confirm dialog with "opponent offers draw", avec possible bouton "prevent future offers" + bouton "proposer nulle"
 346 //+ bouton "abort" avec score == "?" + demander confirmation pour toutes ces actions,
 347 //comme sur lichess
 348 //
 349 //TODO: quand partie terminée (ci-dessus) passer partie dans indexedDB